Page 188, Question 29’s Answer: Add as second sentence: “IGRP routes thatare automatically redistributed into EIGRP (IGRP and EIGRP processes havingthe same AS number, running on the same router) also do not need a seedmetric.”

Errata for BSCI Quick Reference Sheets

NAT with Route Maps

Page 226–

Remove “and destination” in the second sentence.

Classless IP Routing Protocols,

Classless Routing

Page 228–

Add BGP to the list of classless routing protocols.

Comparing RIP and IGRP

IGRP

Page 230, third paragraph, second sentence–

Change “By default, RIP will beenabled on… “ to “By default, RIP and IGRP will be enabled on …”

In the first paragraph after the bullets, change the second sentenceto read “Hellos and ACKs are not acknowledged.”

Low-Level OSPF,

Neighborship

Page 239, under "Troubleshooting OSPF"–

Change “show ip ospf interfaces”

and show ip “ospf neighbors”

to

“show ip ospf interface” and “show ip ospfneighbor”.

Page 240–

Change the bullet list after “the following must match”to:



Hello/dead timers



Area ID



Authentication type and password



Common subnet



Stub area flag

Page 240–

Change the process of route exchange between two OSPF routersto read:

1.

Down state:no hellos sent

2.

Init state:

router sends hello packets out all OSPF interfaces

3.

Two-way state:

router receives a hello from another router that containsits own router ID in the neighbor list

4.

Exstart state:

routers determine who will start the exchange process

5.

Exchange state:

routers exchange DBDs listing the LSAs in their LSdatabase by RID and sequence number.

6.

Loading state:

Each router compares the DBD received to the contentsof is LS database. It then sends a Link State Request for missing oroutdated LSAs. Each router responds to its neighbors LSR with a LinkState Update. Each LSU is acknowledged.

7.

Full state:

The LS database has been synchronized with the adjacentneighbor.

IS-IS,

IS-IS Acronyms

Page 243–

The lower 5 rows should be included in the table.

Page 243, top left, third paragraph–

Change all intra-area to all inter-area.

Basic IS-IS Commands

Page 245–

The lower 8 rows should be included in the table.

BGP,

Basic BGP Commands

Page 251–

The lower 4 rows should be included in the table.

BGP Attributes

Page 253–

In the table, under the description of Weight, change ‘significant’ to‘significance’.